Algonquin, IL is a city located in Mchenry County, Illinois and has a land area of 15.76 square miles (40.82 km2). The water area for the city is 0.44 square miles or 1.14 km2. There is one unique zip code in Algonquin, Illinois and it is 60102. The area code(s) for Algonquin is 224/847.
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